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Message-ID: <20080916220356.2dd140b7@daedalus.pq.iki.fi>
Date: Tue, 16 Sep 2008 22:03:56 +0300
From: Pekka Paalanen <pq@....fi>
To: Ingo Molnar <mingo@...e.hu>
Cc: Pekka Paalanen <pq@....fi>, Steven Rostedt <rostedt@...dmis.org>,
Frédéric Weisbecker <fweisbec@...il.com>,
Linux Kernel <linux-kernel@...r.kernel.org>,
"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
Pavel Roskin <proski@....org>
Subject: [PATCH 6/7] mmiotrace: remove left-over marker cruft.
>From abd3cadc69143804cf4b0cf1d6fcadda5daad903 Mon Sep 17 00:00:00 2001
From: Pekka Paalanen <pq@....fi>
Date: Sun, 14 Sep 2008 20:50:55 +0300
Subject: [PATCH] mmiotrace: remove left-over marker cruft.
Signed-off-by: Pekka Paalanen <pq@....fi>
---
arch/x86/mm/mmio-mod.c | 64 ---------------------------------------------
include/linux/mmiotrace.h | 3 +-
2 files changed, 1 insertions(+), 66 deletions(-)
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index 5e2e2e7..2c4baa8 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -56,13 +56,6 @@ struct remap_trace {
static DEFINE_PER_CPU(struct trap_reason, pf_reason);
static DEFINE_PER_CPU(struct mmiotrace_rw, cpu_trace);
-#if 0 /* XXX: no way gather this info anymore */
-/* Access to this is not per-cpu. */
-static DEFINE_PER_CPU(atomic_t, dropped);
-#endif
-
-static struct dentry *marker_file;
-
static DEFINE_MUTEX(mmiotrace_mutex);
static DEFINE_SPINLOCK(trace_lock);
static atomic_t mmiotrace_enabled;
@@ -97,44 +90,6 @@ static bool is_enabled(void)
return atomic_read(&mmiotrace_enabled);
}
-#if 0 /* XXX: needs rewrite */
-/*
- * Write callback for the debugfs entry:
- * Read a marker and write it to the mmio trace log
- */
-static ssize_t write_marker(struct file *file, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- char *event = NULL;
- struct mm_io_header *headp;
- ssize_t len = (count > 65535) ? 65535 : count;
-
- event = kzalloc(sizeof(*headp) + len, GFP_KERNEL);
- if (!event)
- return -ENOMEM;
-
- headp = (struct mm_io_header *)event;
- headp->type = MMIO_MAGIC | (MMIO_MARKER << MMIO_OPCODE_SHIFT);
- headp->data_len = len;
-
- if (copy_from_user(event + sizeof(*headp), buffer, len)) {
- kfree(event);
- return -EFAULT;
- }
-
- spin_lock_irq(&trace_lock);
-#if 0 /* XXX: convert this to use tracing */
- if (is_enabled())
- relay_write(chan, event, sizeof(*headp) + len);
- else
-#endif
- len = -EINVAL;
- spin_unlock_irq(&trace_lock);
- kfree(event);
- return len;
-}
-#endif
-
static void print_pte(unsigned long address)
{
unsigned int level;
@@ -481,26 +436,12 @@ static void leave_uniprocessor(void)
}
#endif
-#if 0 /* XXX: out of order */
-static struct file_operations fops_marker = {
- .owner = THIS_MODULE,
- .write = write_marker
-};
-#endif
-
void enable_mmiotrace(void)
{
mutex_lock(&mmiotrace_mutex);
if (is_enabled())
goto out;
-#if 0 /* XXX: tracing does not support text entries */
- marker_file = debugfs_create_file("marker", 0660, dir, NULL,
- &fops_marker);
- if (!marker_file)
- pr_err(NAME "marker file creation failed.\n");
-#endif
-
if (nommiotrace)
pr_info(NAME "MMIO tracing disabled.\n");
enter_uniprocessor();
@@ -525,11 +466,6 @@ void disable_mmiotrace(void)
clear_trace_list(); /* guarantees: no more kmmio callbacks */
leave_uniprocessor();
- if (marker_file) {
- debugfs_remove(marker_file);
- marker_file = NULL;
- }
-
pr_info(NAME "disabled.\n");
out:
mutex_unlock(&mmiotrace_mutex);
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h
index 60cc3bf..139d7c8 100644
--- a/include/linux/mmiotrace.h
+++ b/include/linux/mmiotrace.h
@@ -67,8 +67,7 @@ enum mm_io_opcode {
MMIO_WRITE = 0x2, /* struct mmiotrace_rw */
MMIO_PROBE = 0x3, /* struct mmiotrace_map */
MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */
- MMIO_MARKER = 0x5, /* raw char data */
- MMIO_UNKNOWN_OP = 0x6, /* struct mmiotrace_rw */
+ MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */
};
struct mmiotrace_rw {
--
1.5.6.4
--
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